b0a34104072dd7e69fd5aafeb8bba7ba8d84fddf869f0a15ac48dc7c64c2c3b1

Analysis

max time kernel
164s
max time network
171s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04/05/2024, 15:29

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General

Target

2024-05-04_0e83028762b5c35d943d7b2f2632700e_cryptolocker.exe
Size

43KB
MD5

0e83028762b5c35d943d7b2f2632700e
SHA1

b6e973df994a2d343c775ae17d50a5c0606202c1
SHA256

b0a34104072dd7e69fd5aafeb8bba7ba8d84fddf869f0a15ac48dc7c64c2c3b1
SHA512

60a558eeec19e47c47329569c4e4156ee988a7157da976cfee7a80f0f506089a22990775787a0da31b4bebc4437b072940fb6904cb0bb7de3b45ed65776379cb
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9DU8:b/pYayGig5HjS3NPA9DX

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002323a-12.dat	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-04_0e83028762b5c35d943d7b2f2632700e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3956	retln.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 228 wrote to memory of 3956	228	2024-05-04_0e83028762b5c35d943d7b2f2632700e_cryptolocker.exe	92
PID 228 wrote to memory of 3956	228	2024-05-04_0e83028762b5c35d943d7b2f2632700e_cryptolocker.exe	92
PID 228 wrote to memory of 3956	228	2024-05-04_0e83028762b5c35d943d7b2f2632700e_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-05-04_0e83028762b5c35d943d7b2f2632700e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_0e83028762b5c35d943d7b2f2632700e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:228
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3956

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3708 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
1⤵
PID:3676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
43KB

MD5
887ff6ee4a68c98c0328ad540ba40117

SHA1
96cefa0192f3cc4de85b5d1fce795f6f2f7608ef

SHA256
2d397cd58fd1ec6aa0710feb19552ebb407395da1df5f72c291090fea57bccc1

SHA512
d4dc53f807402fa3d95baebd140ec484f6ddee82c37009d1b3e6ea9585cef933587c58e6431ba986aaa0909a2b147c4dfa072d8ca54b27e300cc5e35ac160815

Download Submit
memory/228-0-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/228-1-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/228-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/228-17-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3956-22-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download